how do i link the same gear into 2 slots and a default glamour?

[Callinon]

There actually is a way: use gear that is incompatible with the class it is being applied to.

In this case, to make BLM have the default gear appearance, you'd put SMN or RDM relic gear on the plate. IIRC it has to be from the same group of classes so the glamour will be applied and not just fail.

I hadn't thought of that. Yeah that'd probably work. But it'd be a very niche use case in which the user wants to use job-specific gear as the glamour and not just like, a company tabard on the SMN and a raincoat on the RDM or something.

[Iscah]

I hadn't thought of that. Yeah that'd probably work. But it'd be a very niche use case in which the user wants to use job-specific gear as the glamour and not just like, a company tabard on the SMN and a raincoat on the RDM or something.

That's still doable - you put the SMN/RDM gear on the BLM plate, not the one it belongs to. Then when you apply the plate to the BLM, they are now wearing [Generic Coat of Casting glamoured as Summoner Coat] and the system looks at that and says "sorry, you can't equip that Summoner Coat, so it's going to display as the Generic Coat" - which in this case is exactly what you want to happen.

[Callinon]

That's still doable - you put the SMN/RDM gear on the BLM plate, not the one it belongs to. Then when you apply the plate to the BLM, they are now wearing [Generic Coat of Casting glamoured as Summoner Coat] and the system looks at that and says "sorry, you can't equip that Summoner Coat, so it's going to display as the Generic Coat" - which in this case is exactly what you want to happen.

Not quite what I was talking about, and I have no idea what the OP wants to do.

Let me try again, maybe I'll do better this time.

Let's say I want 3 glamour sets: SMN, RDM, and BLM.. all glamouring over the same set of gear:

SMN - Company Tabard dyed green, long skirt, emperor's new gloves, ... shoes ... whatever shoes.
RDM - Raincoat dyed red, pants, gloves, shoes
BLM - The default look for the gear

As far as I can tell this setup is impossible without a third glamour plate set up to just look like the gear already looks. I'm not including any job-specific gear at all, so there's no failover possibility here. Those two glamoured sets are usable by all three jobs, so whichever one was used last will be the one BLM uses each time I switch to it.

Using job-specific gear would be fine, but if you just want 2 different looks plus the default, there really isn't a good way to do it.

Again though, I don't know what the OP's intention here was as they haven't expanded on it at all.

[Hasrat]

As far as I can tell this setup is impossible without a third glamour plate set up to just look like the gear already looks.

That's basically what's already been said. Nobody disagrees with this. The two proposed suggestions are using a third plate set up for default gear look, or using a third plate set up using job gear that the intended job cannot wear, resulting in the same default appearance. It's all you can really do, unless OP wants to buy glamour dispellers every time they swap.

[Iscah]

As far as I can tell this setup is impossible without a third glamour plate set up to just look like the gear already looks.

Correct.

There's no way to achieve it without either a third plate or paying for dispellers every time.

My point is that it's possible with a plate. You said (direct quote) "there's no way to create a glamour plate that dispels glamours" so I explained that there actually is.

It might not be what the OP was asking, but I wasn't directly responding to their question.

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Anyway. More generally...

The thing with glamour plates is that it seems like a new system, but they're just a quick way of applying a whole set of prisms at once. They're not temporary overlays.

Once your gear has had a plate applied, it's the same as it was with prisms: you can apply a new glamour over the old one, or you can dispel it.

Using a third plate is the more efficient option, as you don't need to spend dispellers, and you can link it to the BLM gearset if you want to.